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地震 ›› 2013, Vol. 33 ›› Issue (1): 127-140.

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辽宁地区前兆异常空间分布的集中性与非均匀性研究

曹凤娟, 焦明若, 王海燕, 翟丽娜, 尹德录   

  1. 辽宁省地震局, 辽宁 沈阳 110034
  • 收稿日期:2012-03-29 修回日期:2012-09-20 出版日期:2013-01-31 发布日期:2020-10-16
  • 作者简介:曹凤娟(1970-),女,辽宁新民人,高级工程师,主要从事地震预测预报等研究。
  • 基金资助:
    辽宁省地震局重点实验室项目(LZD1102)

Spatial Centrality and Inhomogeneity of Precursory Anomalies in Liaoning region, China

Cao Feng-juan, JIAO Ming-ruo, WANG Hai-yan, ZHAI Li-na, YIN De-lu   

  1. Earthquake Administration of Liaoning Province, Shenyang 110034, China
  • Received:2012-03-29 Revised:2012-09-20 Online:2013-01-31 Published:2020-10-16

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摘要： 通过对1988年以来辽宁地区年度前兆异常空间分布特征的分析与计算, 结果发现, 辽宁及邻区5级以上地震前1～3年中短期异常空间分布非均匀性指标CV值均出现明显的高值(大于等于2倍均方差)。 异常空间分布集中度RV值与异常频次正相关, 与最大震级反相关, 可作为参考指标, 配合CV值使用。 当CV值出现高值异常期间, 若RV低于均值并接近30 km时, 1年内辽宁地区发生M≥5.0地震的可能性较大。

关键词: 前兆异常, 非均匀性, 集中度, 辽宁地区

Abstract: We analysed and calculate spatial centrality and inhomogeneity of precursory anomalies in Liaoning region, China since 1988. The results show that the inhomogeneity index CV value of the anomaly distribution in the short to medium term appeared obviously high value(more than or equal to one times of mean square) 1 to 3 years before M≥5.0 earthquakes happened in Liaoning and its adjacent area. The RV value of the anomaly distribution concentration was correlated positively with the anomaly frequency, negatively with the maximum magnitude, and could be used as the indicators in combination with the CV value. On condition that the CV value appeared high value, and the RV value was lower than the mean value and close to 30 km, M≥5.0 earthquake would have a high possibility in Liaoning for the next year.

Key words: Precursory anomaly, Inhomogeneity, Concentration, Liaoning region

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